Climate and hydrological changes in tropical Africa during the past million years

被引：25
|
作者：
Gasse, Francoise [1 ]
机构：
[1] CEREGE, UMR 6635, F-13545 Aix En Provence 04, France
来源：
COMPTES RENDUS PALEVOL | 2006年 / 5卷 / 1-2期
关键词：
tropical Africa; palaeoclimates; palaeohydrology; pliocene; quaternary;
D O I：
10.1016/j.crpv.2005.09.012
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
Tropical African climate has oscillated between markedly wetter and drier conditions on all timescales in response to global climate disturbances. A step-like increase in aridity over the past 3 Ma has been primarily paced by orbital cycles coupled with the onset and amplification of high-latitude glacial cycles. On the 10(4)-10(3)-ka timescales, observed changes imply interactions between insolation, sea-surface conditions and vegetation. High-frequency variations could be linked to oscillations in major atmospheric circulation modes, in solar output, or to major volcanic events.
引用
收藏
页码：35 / 43
页数：9
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